Lash brush

ABSTRACT

A lash brush includes a case, a rotatable shaft, a plurality of bristles and a reciprocating transmission mechanism, the rotatable shaft is driven into reciprocal motion along an axial line by the reciprocating transmission mechanism, a first unit of the reciprocating transmission mechanism comprises an actuating surface having a plurality of spacing members, a second unit of the reciprocating transmission mechanism comprises a contacting terminal contacting against each of the spacing terminals in sequence to make the rotatable shaft vibrate back and forth instantaneously along the axial line.

FIELD OF THE INVENTION

The present invention is generally related to a lash brush, which particularly relates to the lash brush for making a rotatable shaft instantaneously vibrate back and forth along an axial line.

BACKGROUND OF THE INVENTION

A conventional lash brush 10 as illustrated in FIG. 1 utilizes a motor 11 to drive a shaft 12 into rotation. The shaft 12 enables to move back and forth via clockwise/counterclockwise rotation of the motor 12. When a user holds the lash brush 10 and applies the mascara to the eyelash, under the limitation that conventional lash brush 10 merely possesses forward or backward moving paths, the user must make the lash brush 10 separate instantaneously from the eyelash and contact rapidly with the eyelash by hand's holding motions to prevent glutinous mascara from solidifying onto the eyelashes so that block-shaped or globular solidification of the mascara attached onto the eyelashes may be avoidable. However, for some inexperienced or sluggish users, when they apply the mascara to the eyelashes by using the lash brush 10, the mascara is likely formed as block-shape or spherical-shape and solidified onto the eyelashes. Accordingly, a disturbance for a user to repetitively remove and apply make-up is frequently occurred.

SUMMARY

The primary object of the present invention is to provide a lash brush for making a rotatable shaft coupled to a plurality of bristles vibrate back and forth instantaneously along an axial line. When the mascara applies onto the eyelashes, the lash brush prevents the mascara attached onto the eyelashes from forming as patch-shaped or ball-shaped solidification.

A lash brush in accordance with the present invention includes a case, a rotatable shaft, a plurality of bristles and a reciprocating transmission mechanism, wherein the case comprises a ring wall, a bottom portion and an accommodating slot surrounded by the ring wall, the rotatable shaft comprises a first end portion and a second end portion, and the bristles are coupled to the first end portion of the rotatable shaft. The reciprocating transmission mechanism means for driving the rotatable shaft and includes a first unit and a second unit contacting against the first unit. The first unit comprises an actuating surface having a base surface and a plurality of spacing members alternately formed on the base surface, and the second unit comprises a contacting terminal sequentially contacting against each of the spacing members.

In this invention, by means of the contacting terminal in contact against each of the spacing members in sequence, when the rotatable shaft is driven to rotate by the reciprocating transmission mechanism, the rotatable shaft vibrates back and forth instantaneously. Accordingly, when a user holds the lash brush and applies the mascara onto the eyelashes, the motion of the rotatable shaft prevents glutinous mascara attached onto the eyelashes from forming into block-shaped or globular solidification.

DESCRIPTION OF THE DRAWINGS

FIG. 1 is a section view illustrating a conventional lash brush.

FIG. 2 is a section view illustrating a lash brush in accordance with a first embodiment of the present invention.

FIG. 3 is a section view illustrating the lash brush in accordance with the first embodiment of the present invention.

FIG. 4 is a section view illustrating a lash brush in accordance with a second embodiment of the present invention.

FIG. 5 is a section view illustrating the lash brush in accordance with the second embodiment of the present invention.

FIG. 6 is a section view illustrating a lash brush in accordance with a third embodiment of the present invention.

FIG. 7 is a section view along A-A line of FIG. 6.

FIG. 8 is a section view illustrating a lash brush in accordance with a fourth embodiment of the present invention.

FIG. 9 is a section view along B-B line of FIG. 8.

DETAILED DESCRIPTION OF THE INVENTION

With reference to FIGS. 2 and 3, a lash brush 100 in accordance with a first embodiment of the present invention includes a case 110, a rotatable shaft 120, a plurality of bristles 130 and a reciprocating transmission mechanism 140. A user may hold the lash brush 100 and apply the mascara to the eyelashes. The case 110 comprises a ring wall 111, a bottom portion 112, an accommodating slot 113 surrounded by the ring wall 111 and a cover 114, wherein the bottom portion 112 comprises a through hole 112 a, and the cover 114 is utilized for sealing the accommodating slot 113. In this embodiment, the reciprocating transmission mechanism 140 is disposed in the accommodating slot 113, the rotatable shaft 120 comprises a first end portion 121 and a second end portion 122 and penetrates through the through hole 112 a. The first end portion 121 protrudes from the bottom portion 112 of the case 110, the second end portion 122 is disposed in the accommodating slot 113 of the case 110, and the bristles 130 are coupled to the first end portion 121 of the rotatable shaft 120.

Referring to FIG. 2, the reciprocating transmission mechanism 140 couples to the rotatable shaft 120 and includes a first unit 141, a second unit 142 and a driving unit 143. The reciprocating transmission mechanism 140 drives the rotatable shaft 120 in a reciprocating motion along an axial line X, in this embodiment, the reciprocating transmission mechanism 140 is coupled to the second end portion 122 of the rotatable shaft 120 via the first unit 141. The second unit 142 of the reciprocating transmission mechanism 140 is disposed on the ring wall 111 and located in the accommodating slot 113. The first unit 141 comprises an actuating surface 141 a having a base surface 141 b and a plurality of spacing members 141 c formed on the base surface 141 b, wherein the spacing members 141 c are alternately disposed from one another. The spacing members 141 c are selected from protrusions protruded from the base surface 141 b or slots recessed to the base surface 141 b, which means an uneven structure is formed on the actuating surface 141 a by disposition of the spacing members 141 c. The first unit 141 is selected from a spatial cam, such as a cylindrical cam or an end cam, and the actuating surface 141 a is selected from a transmission surface of the spatial cam or an outer peripheral surface located outside the transmission surface. With reference to FIG. 2, the first unit 141 is an end cam, the actuating surface 141 a is an end surface (transmission surface) of the end cam. The reciprocating transmission mechanism 140 further includes an elastic member 144, the second unit 142 comprises a contacting terminal 142 a, one end of the elastic member 144 contacts against the bottom portion 112, and another end of the elastic member 144 contacts against the first unit 141 so as to make the actuating surface 141 a of the first unit 141 contact and press the contacting terminal 142 a of the second unit 142. When the first unit 141 is in rotation, the rotatable shaft 120 and the bristles 130 are driven by the first unit 141 to rotate along the axial line X. Besides, owing to the contacting terminal 142 a in contact with the actuating surface 141 a, the first unit 141, the rotatable shaft 120 and the bristles 130 move linearly reciprocally along the axial line X, in the mean time, the contacting terminal 142 a contacts against each of the spacing members 141 c in sequence so that the first unit 141, the rotatable shaft 120 and the bristles 130 vibrate back and forth instantaneously along the axial line X.

Referring to FIGS. 2 and 3, the driving unit 143 is a motor and simultaneously drives the first unit 141 and the rotatable shaft 120 to rotate along the axial line X. With reference to FIG. 3, when the first unit 141 rotates along the axial line X, the contacting terminal 142 a contacts against each of the spacing members 141 c of the actuating surface 141 a in sequence so as to make the first unit 141 vibrate instantaneously along the axial line X therefore simultaneously causing the rotatable shaft 120 and the bristles 130 to vibrate instantaneously along the axial line X. Particularly, the amplitude of instantaneous vibration for the first unit 141, the rotatable shaft 120 and the bristles 130 along the axial line X approximately equal to the height or depth of each of the spacing members 141 c.

When the user holds the lash brush 100 and applies the mascara to the eyelash, for the reason that the bristles 130 vibrate instantaneously along the axial line X, the time for the bristles 130 of the lash brush 100 in contact with the eyelash can be shorten. Therefore, when the glutinous mascara attached to the bristles 130 enables to separate instantaneously from the eye lash or contact instantaneously with the eye lash (the two actions are taken place one after another), the time for the bristles 130 in contact with the eyelash will last shortly so as to prevent the mascara attached to the eyelashes from forming into block-shaped or globular solidification. The disturbance for repetitively removing or applying the user's make up can be avoidable.

With reference to FIGS. 4 and 5, a lash brush 100 in accordance with a second embodiment of the present invention includes a case 110, a rotatable shaft 120, a plurality of bristles 130 and a reciprocating transmission mechanism 140. The primary difference between the second embodiment and the first embodiment is that the first unit 141 of the reciprocating transmission mechanism 140 is a cylindrical cam, wherein a peripheral surface of the first unit 141 comprises a cyclic slot A, and the actuating surface 141 a is the transmission surface of the cyclic slot A.

The reciprocating transmission mechanism 140 is coupled to the rotatable shaft 120. In this invention, by means of (1) the driving unit 143 driving the first unit 141 and the rotatable shaft 120 into rotation along the axial line X, (2) the first unit 141 and the second unit 142 driving the rotatable shaft 120 into reciprocal linear motion along the axial line X, and (3) the contacting terminal 142 a in contact against each of the spacing members 141 c in sequence, the lash brush 100 enables to make the bristles 130 coupled to the rotatable shaft 120 vibrate instantaneously along the axial line X to prevent the time for the mascara in contact against the eyelashes from lasting too long. Therefore, the possibility for forming block-shaped or globular solidified mascara onto the eyelashes can be avoidable.

Referring to FIGS. 6 and 7, a lash brush 100 in accordance with a third embodiment of the present invention includes a case 110, a rotatable shaft 120, a plurality of bristles 130 and a reciprocating transmission mechanism 140. The primary difference between the third embodiment and the first embodiment is that the actuating surface 141 a of the first unit 141 is disposed on an outer peripheral surface located outside the transmission surface of the end cam. In this embodiment, the lash brush 100 further includes a third unit 145, wherein one end of the third unit 145 contacts against the transmission surface of the end cam, and another end of the third unit 145 is disposed on the ring wall 111 and located in the accommodating slot 113. When the first unit 141 is in rotation, the rotatable shaft 120 and the bristles 130 are driven to rotate along the axial line X by the first unit 141. Besides, the third unit 145 is in contact against the transmission surface of the end cam to make the first unit 141, the rotatable shaft 120 and the bristles 130 move linearly reciprocally along the axial line X, meantime, the contacting terminal 142 a of the second unit 142 contacts against the actuating surface 141 a of each of the spacing members 141 c in sequence to make the first unit 141, the rotatable shaft 120 and the bristles 130 vibrate instantaneously along a direction perpendicular to the axial line X so as to prevent the time for the mascara in contact against the eyelashes from lasting too long. Therefore, the possibility for forming block-shaped or globular solidified mascara onto the eyelashes can be avoidable.

Referring to FIGS. 8 and 9, a lash brush 100 in accordance with a fourth embodiment of the present invention includes a case 110, a rotatable shaft 120, a plurality of bristles 130 and a reciprocating transmission mechanism 140. The primary difference between the fourth embodiment and the second embodiment is that the actuating surface 141 a of the first unit 141 is disposed on a bottom surface of the cyclic slot A.

In this embodiment, by means of (1) the driving unit 143 driving the first unit 141 and the rotatable shaft 120 into rotation along the axial line X, (2) the first unit 141 and the second unit 142 driving the rotatable shaft 120 into reciprocal linear motion along the axial line X and (3) the contacting terminal 142 a in contact against each of the spacing members 141 c in sequence, the lash brush 100 enables to make the bristles 130 coupled to the rotatable shaft 120 vibrate instantaneously along a direction perpendicular to the axial line X to prevent the time for the mascara in contact against the eyelash from lasting too long. Therefore, the possibility for forming block-shaped or globular solidified mascara onto the eyelashes can be avoidable.

While this invention has been particularly illustrated and described in detail with respect to the preferred embodiments thereof, it will be clearly understood by those skilled in the art that it is not limited to the specific features and describes and various modifications and changes in form and details may be made without departing from the spirit and scope of this invention. 

What is claimed is:
 1. A lash brush includes: a case having a ring wall, a bottom portion and an accommodating slot surrounded by the ring wall; a rotatable shaft having a first end portion and a second end portion; a plurality of bristles coupled to the first end portion of the rotatable shaft; and a reciprocating transmission mechanism for driving the rotatable shaft, the reciprocating transmission mechanism includes a first unit and a second unit contacting against the first unit, the first unit comprises an actuating surface having a base surface and a plurality of spacing members alternately formed on the base surface, the second unit comprises a contacting terminal, when the first unit is in rotation, the contacting terminal contacts against each of the spacing members in sequence.
 2. The lash brush in accordance with claim 1, wherein the first unit of the reciprocating transmission mechanism is selected from one of a cylindrical cam or an end cam.
 3. The lash brush in accordance with claim 2, wherein the actuating surface of the reciprocating transmission mechanism is disposed on a transmission surface of the cylindrical cam or a transmission surface of the end cam.
 4. The lash brush in accordance with claim 2, wherein the reciprocating transmission mechanism further includes a third unit, and one end of the third unit is in contact against the transmission surface of the end cam.
 5. The lash brush in accordance with claim 2, wherein the actuating surface of the reciprocating transmission mechanism is disposed on an outer peripheral surface located outside a transmission surface of the cylindrical cam or an outer peripheral surface located outside a transmission surface of the end cam.
 6. The lash brush in accordance with claim 5, wherein the actuating surface of the reciprocating transmission mechanism is disposed on a bottom surface of a cyclic slot of the cylindrical cam.
 7. The lash brush in accordance with claim 1, wherein the second unit of the reciprocating transmission mechanism is disposed on the ring wall and located in the accommodating slot.
 8. The lash brush in accordance with claim 7, wherein the reciprocating transmission mechanism further includes an elastic member, one end of the elastic member contacts against the bottom portion, and another end of the elastic member contacts against the first unit.
 9. The lash brush in accordance with claim 1, wherein the spacing members are selected from protrusions protruded from the base surface or slots recessed to the base surface.
 10. A lash brush includes: a rotatable shaft; a plurality of bristles coupled to one end of the rotatable shaft; and a reciprocating transmission mechanism for driving the rotatable shaft into reciprocal motion along an axial line, wherein the reciprocating transmission mechanism includes a first unit and a second unit, the first unit comprises an actuating surface having a base surface and a plurality of spacing members alternately formed on the base surface, the second unit comprises a contacting terminal, when the first unit is in rotation, the contacting terminal contacts against each of the spacing members in sequence to make the first unit vibrate reciprocally.
 11. A lash brush includes: a rotatable shaft, one end of the rotatable shaft comprises a plurality of bristles; and a reciprocating transmission mechanism utilized for driving the rotatable shaft into rotation and reciprocal linear motion along an axial line, wherein the reciprocating transmission mechanism includes a first unit and a second unit contacting against the first unit, the first unit comprises an actuating surface having a plurality of spacing members alternately disposed from one another, the second unit comprises a contacting terminal, when the first unit is in rotation, the contacting terminal contacts against each of the spacing members in sequence to make the bristles vibrate reciprocally along the axial line or a direction perpendicular to the axial line. 